Crusher



July 23, 1935. E T ,sETERSON l2,009,186

CRUSHER Filed Aug. 26, 1932 5 Sheets-Sheet l July 23, 1935. E. T. PETERSON 2,009,186

CRUSHER Filed Aug. 26, 1932 Sheets-Sheet 2 MTP 'm if @im July 23, 1935. E. T. PETERSON 2,009,186

GRUSHER Filed Aug. 26, 1932 5 sheets-sheet 3 A. w 5 v ljszlmom E. T.PETERsoN, l 2,009,186 4 CRUSHER July 23, 1935.

Filed Aug. 2e', 1952 5 sheets-sheet 4 v July 23, 1935.l E. T. PETERSON 2,009,186

. CRUSHER Filed Aug. 26, 1932 5 Sheets-Sheet 5 W M NQS@ smaller sizes.

`Patented July 23, 1935 APATENT OFFICE v 2,009,180 causaran Edward T. Peterson, Reading, Pa., assignor to Brdsboro Steel Foundry and Machine Company, Birdsboro, Pa., a corporation of Pennsylvania Application August 26,1932, serial No. 630,490 1s claims. (ci. ca -53) My invention relates to crusher equipment, for crushing stones and the like into pieces` of Important features of the invention relate more particularly to a double-acting crusher` in which an angularly reciprocating rocker presents on its opposite sides crushing jaws that respectively cooperate with normally stationary anvil plates facing the opposite sides of the rocker, each of the jaws on opposite sides of the rocker alternately crushing and retracting as the other respectively retracts and crushes. Other features of the invention relate to anvil plates comprising the normally stationary jaws of crushers. Still other features relate to desirable details of replacement members of crushers.

The features of. my invention are generally applicable somewhat less desirably to a single-acting crusher. y

A purpose of the invention is to provide equipment of the character-indicated adapted to easy yand inexpensive manufacture and well suited vto the needs of service.

A further purpose is to locate a rotating e'ccentric that longitudinally reciprocates a link to angularly reciprocate the main rocker of a preferably double-acting crusher, wholly outside of a space directly beneath the rocker in order to make the bearings of thev drive shaft more accessible and keep them away from the deleterious action of dust and particles of broken stone or the like incident to the operation of the crusher.

A further purpose is to operate the rocker of a preferably double-acting crusher of the character indicated by a link, making toward its one end under the rocker a heavy duty socket or knuckle joint connection with the rocker, and at its other end longitudinally reciprocatedmy an eccentric connection with a rotating powershaft -outside the space beneath the rocker. I locate the power shaft outside the space beneath the rocker, use a long link and provide a socket or knuckle connection between the link and rocker near the outer end of the link and preferably directly under the rocker axis when the rocker is in mid position. f

A further purpose is to deliver the crushed material from one side of a double-acting crusher ofthe character indicated through an opening in an intermediate portion of a link reciprocating. the rocker of the crusher from an eccentric ou'tside of the space beneath the rocker.

-A further purpose is to maintain contact between the different' parts of socket bearings be-` tween the rocker of a crusher and a link., angularlyrreciprocating the rocker in cooperating relationship, by a resilient tie between an upper portion of the rocker and `the link at a part thereof adjacent the bearing.

A further purpose is to protect a shoe and socket bearing beneath the rocker of. a prefer-` -ably double-acting stone crusher, and between the rocker and an `outer end of an operating link, from dust and broken particles of stone or the like incident to the operation of the crusher.

A further purpose is to provide a single or .10 double-acting crusher with a crusher jaw that will be unyielding during normal crushing operations and adapted to yield momentarily if 'subjected to an undesirably high force incident to the presence of an uncrushable body between the rocker and the jaw of the crusher.

A further purpose is to support an anvil (one of the crusher jaws) of a crusher of the character indicated from yielding rearwardly during normal crushing operations by toggle mechanismA adapted to resilently release if the operating face of the anvil is subjected to abnormal undesirably high pressure due to any uncrushable body be-l tween the anvil and the cooperating jaw of the crusher.

A further purpose is to use a knee and socket connection between an upper and rearward end of. an anvil and stationary structure above the anvil to prevent an up ard yielding of the anvil during crushing. A 30 A further purpose is to maintain the opposing members of a knee and .socket connection between an upper and rearward end of an anvil and stationary supporting structure above the anvil normally resiliently pressed together.

Afurther purpose is to support the upper and' rearward end of an anvil rearwardly of the center of gravity of the anvil to maintain the anvil in automatic engagement withl togglev supporting mechanism rearwardly of the anvil.

Further purposes will appear in the specication and in the claims.

I have elected to illustrate one only of the many different forms of my invention, selecting a form Figures 5 and 6 are sections of Figure 1 taken upon the lines 5-5 and 6--6 thereof in the directions of the arrows.

Figure '7 is an enlarged detail section taken upon the line 1-1 of Figure 2.

Figure 8 is an enlarged fragment of Figure 3.

Like numerals refer to like parts.

Describing in illustration and not in limitation. and referring to the drawings:-

In the illustrated embodiment of the invention a supporting shell and frame structure III, carries pivotally at II a main rocker I2 which presents its preferably downwardly diverging opposite faces I3 and I4 to cooperate as the movable crushing jaws with normally stationary anvil members I5 and I6 respectively.

Stone or the like is crushed between each anvil I5 or I6 and the adjacent face I3 or I4 of the rocker, the crushing stroke Atoward one anvil being the retracting stroke from the other and vice versa. The main rocker `I2 is thus double acting in its crushing operations, each rocking movement in one direction crushing on one side and retracting on the other and ,being succeeded by a rocking movement in the other direction that retracts on the rst side and crushes on the second. 4

The rocker I 2 is extended downwardly from the lower edges of the crushing faces I3 and I4 as a shell I1 that conve ges to a transverse knee or head I8.

The head or knee I8, suitably integral with the shell I1, is axially parallel with the pivotal axis of the rocker and presents along its length arcuate pivot surfaces to shoes I9 and 20 that connect the head with the outer end of a link 2|, the shoes and intermediate head tting between opposite sides ofa downwardly tapering opening 22 in the outer end of the link.

The linkor eccentric rod 2| is longitudinally reciprocated by aneccentric 23 upon a main drive shaft 24 which is supported in vertically divided pillow block bearings 25 carried by the stationary frame structure. The drive shaft 24 also supports a pulley 24' and a ily wheel 242.

The main rocker 'I2 is preferably so formed that when in mid position it is symmetrical with respect to a vertical plane including its pivotal axis, and in this event, the central axes of the drive shaft 24 and of the head I8 are preferably at substantially the same elevation, the drive shaft being laterally offset from the head far enough for the shaft and the eccentric 23 to be wholly out from beneath the crushing jaws of the machine.

The outer end of the link 2| is spring pulled upwardly to its wedge shoe and knuckle'connection with the head I8 of the main rocker, the strong upward pull upon the outer end of the link bearing upon the shoes and maintaining the shoes in close engagement with the head.

This pull is suitably effected by the tie bolts 26 and 21 which make eye and pin connections at 28 with opposite sides of the link-2| adjacent the ends of the head I8 of the rocker, extend upwardly through perforations in side lugs 29 from the rocker and are strongly pressed. upwardly by springs 30.

The springs 30 surround the tie bolts and are adjustably compressed between the upper sides of the lugs 29 and washers 3| held to place adjustably by lock nuts 32 on the upper ends of the bolts.

The shoes I9 and 20 t arcuatelyv against the head I8 along substantially the length thereof lrocker and link by downwardly sloping transverse walls and bellies 33, 33', 34, 34' and 35 for Ultimate delivery out a discharge opening-36 in the bottom of the frame and shell structure.

The main rocker is angularly reciprocated by rotation of the drive -shaft 24 whichl is low down and oifset from under the crusher to be well outof the way of the discharging broken stone from the crusher. y A

'I'he link 2| is suitably of cast metal and of open web structure with an overall transverse width as best seen in Figure 4 about the same as the overall width of the main rocker I2.

'Ihe link 2| is provided with a vertical passage 31 through which the broken material from the side of the crusher toward the drive shaft falls to nd outlet from the discharge opening 98 in the bottom of the shell. The baille walls 34, 34' and 35 guide the delivery from the right side of the main rocker to pass downward into the open- ,ing 31 through the link.

'I'he wedge shaped opening 22 containing the shoes I9 and 2|)y and the lhead I8 of thel rockerw intermediate the shoes is preferably closed at top and bottom to avoid entry of dust or the like from the discharging product.

As illustrated the bottom'is closed by a metal plate 38 suitably welded to place while the top by a flexible connection 35i.'l

The connection 39 may be of leather or fabric of bellows or accordion section, fastened around its top at 40 to the downward extension I1 from the main rocker somewhat above the head I8, and held around its bottom by a plate 4I to the link 2| around the top of the taper opening 22, the plate 4| being suitably perforated to pass the head I8.

The main rocker I2 includes a hollow casting 42 of form clearly indicated in the drawings, replaceable wear plates I3 and I4 that form the downwardly sloping and relatively diverging side portions of the rocker, and a cover 43 removably mounted along the top of the casting 42 above the pivotal axis thereof.

'I'he main casting 42 includes the trunnion extensions |I that are received and pivoted in cap sleeves 44, the bearing sleeves 44 being mounted in suitable horizontally divided pillow block housings at 45 in the opposite ends of the frame structure.

The inner faces of the wear plates I3 and I4 rest upon the correspondingly downwardly sloping and relatively diverging side portions of the main casting 42. Some features of the invention are directed to the means'for supoprting these wear plates whereby the plates may be readily removed and replaced by new plates and are effectively retained 'in their operating positionsv ing so that when the wear plates tting against the sloping Ifaces of the casting are pressed dlagonally downwardly on to the shelf or lug members 46, they are locked from moving outwardly at the bottom by a suitable angular overlap' of the shelf or lug members.

Thewear plates and also the anvil membersl preferably diverge downwardly in their widths, as clearly shown in Figures 5 and 6, Figure 5 showing the crushing face of one of the anvils and Figure 6 showing the crushing face of the cooperating wear plate on ,the main rocker.

The opposing end walls 41 and 48 of the body of the shell and frame structure I0 are on the inside parallel and vertical. Iprovide iiller members 43 and 50 that are removably mounted on the vertical end walls 41 and 48 respectively to prop ly case the ends of the anvil plates I5 and I6 a the ends of the downwardly diverging wear platesl3 and III of the'rocker.

The bottom edges of the illler members 49 and 5II seat upon inward projections 5I from the end walls of the shell and are removably boltedA against the shell ends at 52.

Y the wear plates.

'Ihe downward pressure upon the tops of the wear plates locks the bottoms of the wear plates against the lug projections 46 of the main rocker.

The tops of the wear plates I3 and I4 pre- 'sent groove seats 56 to the opposite endsv of the transverse bars 5I, see Figures 3 and 6, the groove seats 56 fitting against thebars and angularly locking therewith. ,l The wear plates I3 and I4 are thus locked from outward movement at the tops by angularly overlapping with the transverse bars 5I and locked from outward movement at the bottom by angular overlapping'with theV shelf or lugprojections 46. u

. The hollow body 42 of the vmain casting of the rocker is transversely perforated to receive the vertically movable horizontal bars 53 and is bored. vertically to receive the vertical rods 55l and springs 54.v 'I'he cover 43 of the rocker is removably bolted at 51 upon the top of the body portion 42. v-

The cover 43 extends along the top of the main rocker I2, affords support for the upper ends of the compressed springs 54 and also provides an upward extension from the rocker that effectively guides, the raw material fed into the hopper 58 to opposite sides of the rocker member.

Special features of my invention are directed to the anvil members which are supported in a way that maintains them normally stationary during normal'crushing yet permits them to yieldresiliently if subjected to abnormal stresses incldent to the entry of an uncrushable body between the anvil and the rocker member.

The anvils are counterparts, each presenting an anvil face I5 or I6 that is presented as part of aremovable wear plate mounted upon a body 59.

The wear plate I5 or I6 and the body 59 carrying the wear plateboth downwardly diverge in width to register with the corresponding diverging plate I3 or I4 uponthe rocker I2.

. action' Yis preferable to The' anvil plate I5 or I6 is removably mounted upon the body 59 of the anvil and detail features of the invention are directed to the connection between the body and plate portions of the anvils.

The chamfered upper edge of the plate I5 or I6 makes an acute angle interlock at 60, Figure 8,

with a downwardly directed abutment across the top of the body, the plate being pressed resiliently upwardly atthe bottom and locked from outward movement at the bottom by the wedge heads 6I of the bolts 62.

The bolts 62 extend diagonally upwardly through perforations in the body 58 of the anvil and are surrounded back of the anvil by springs C8. The springs 63 are adjustably compressed between the back of the anvil and washers 64 by lock nuts 65 on the ends of the bolts and the resilient pull of the boltsxnaintains each anvil plate, I5 or I6 in tight locking connection at its top and bottom edges with the body of the anvil.

As illustrated eachanvil plate is held to its position upon the anvil body by two'bolts 62 as bcst seen in Figures 3, 5 and 8.

The body of thel anvil is supported at the top from movingv upwardly and rearwardly by an arcuate knee projection 66 which presents itsv curved arcuate surface against the correspondingly concaved surface of a downwardly and inwardly presented pillow bearing 61, which is part of the stationary frame structure.

The knee portion 66 of the anvil body isbored axially of the arcuate surface and slotted transversely at 68 and 69 from the outside of the knee inwardlyn to receive the eye portions of eye bolts 10.

Each body is provided with a bolt or pin 1`I axial ofl the arcuate surface of its knee through the eyes of the bolts 10. The bolts 10 pass diagonally outward and upward through perforations 12 of the stationaryA pillow bearing 61 and are sur- .rounded and pulled upwardly by springs 13 adjustably compressed between the upper sloping face of the pillow and washersand look nuts at 14 on the upper ends of the bolts.

The function of the bolts 10 is merely tohold the anvils frommoving downward away from their knee engagements withl the pillow bearings 61.

v The anvils are supported from moving rearwardly at the bottom by toggle mechanism between the back of each anvil near the bottom thereof and a stationary bearing supported by the j frame stricture. Each toggle is normally a little .off dead center with the-central or key membersl of the toggle strongly pressed resiliently toward their dead center positions, whereby a force v ap-` plied to the front of either anvil suf'cient to cause any bendingof its toggle must overcome an adjustably heavy retraction of a spring tending to straighten the toggle. f'

Due to the normally nearly straight position of the toggle, a large component of the force on the lower end of the anvil will be rigidly carried by thel toggle, and only a small component will be borne by the spring. Until the force on the spring isA relatively great, the toggle will maintain its position, but as soon as the spring begins to yield, further yielding will be quick and easy, as .the proportion of the total force which acts on the spring will increase as he toggle breaks.l

once an excessive pressure is applie due to the presence ofan uncrusha tween the crusher jaws This v yielding of a spring act Thus there will be @snap 'ontrigger Ict-1:02.11il).4

Vresistance on l5, and pivot pins anvil, because it quickly withdraws the anvil from its normal position, thus frequently preventing breaking of the jaws which would otherwise occur. As the pressure on the front of the anvil builds up beyond normal crushing pressure, the

the back of the anvil rapidly decreases, saving the jaws from breakage.

, .The preferred form of toggle comprises an intermediate head or key 15 and toggle arms 15 and 11 along opposite sides of the head or key 15, and respectively engaging the back' of the anvil and the stationary bearing.

The head or key 15 is suitably a cylindrical body provided with flat seats 18 at intervals along its upper side and vertically bored at the middle of each seat to loosely pass the lower ends of bolts 19. I

'I'he bolt members 19 are adjustably fastened at their upper ends at to a horizontal rocker shaft 8| pivotally mounted in the stationary frame structure at 82. 'Ihey pass down through suitable openings 83 in the top of the frame structure and below these openings carry flanges 88 that are suitablywelded to the bolts and provide abutments to receive the upper ends of springs 85.

The springs 85 surround the bolts and are compressedbetween the seat portions 18 of the head or key member 15 and the flanges 84, and, since the upper ends of the bolts are anchored, the springs 85 tend to downwardly press (straighten out) the toggle. Collars 86 fastened to the bolts at their lower ends limit the downward movement of the head'or key member 15 along the bolts.

The vertical perforations through the head or key member `15 permit easy sliding of the head or key member along the bolts, provided the compressive force of the springs 85 is overcome.

The vertical adjustment at 8D in the position of the bolts limits the normal approach of the toggle joint to its dead center position by determining the vertical position of the stop collars 86 on the lower ends of the bolts.

The toggle arms 15 and 18 are suitably alike, of rail section, each presenting a concaved base ilange 81 to one side of the cylindrical head or key 15 along substantially the entire length thereof, and each presenting a rounded head 88 to the back of the anvil in a suitable concave seat 89 or to the stationary support at avconcave bearing 88. The togglearms have webs 9i between their head and base portions.

At the ends of the toggle arms 15 and 16 ribs Si' extend across the ends of the head or key 9&2 pass through the ribs 9|' into the ends of the head or key 15.

When the toggle bends and straightens, the toggle arms pivot at one side about othe horizontal axes of the heads 88 and pivot at the other side about the horizontal axis of the cylindrical head or key 15, the head or key sliding vertically on the lower ends of .the bolts 19.

The concave stationary bearing 90 supports the bottom of the anvil from yielding rearwardly during normal stone crushing and comprises an angie member having a flat base seated along a horizontal step 92 and a vertical back adjustably spaced from a riser portion 93 of the step by suitable shims 94 between the bearing and riser. The step structure is a portion of the stationary x: frame of the machine.

While I prefer to make the bearing surfaces of the toggle include convex surfaces along opposite sides of the key and concavesuriaces along the -gle is provided with three 84 integral back of the anvil and along the stationary bearing 98, with mating surfaces respectively concave and convex, the form of the toggle may be changed somewhat according to preference and somewhat according to special conditions. For example, either one of any pair of intertting mating surfaces may be convex with the other surface concave.

As illustrated, the key or head 15 o1' each togsuspension bolts 19, see FigureI 5, the bolts being free to rock by angular movement of the suspending rocker shaft 8|.

It will be understood that the force on this shaft is relatively small, the bolts normally pressing upwardly somewhat upon the shaft 8| and pressing more upwardly the more the toggle joint is deflected out of its normal position. The upward pressure Vis that due to the compression of the springs 85 upon the flanges 84 of the respective bolts.

'Ihe top of the crusher is provided with a removable hopper 58 for receiving the raw material Y rocker on the next stroke with crushing of stones at the rst side.

The anvil members are substantially stationary throughout normal crushing, the position during crushing bemg that indicated by the anvil on the back of the anvil.

In the event of an uncrushable body such as a,l

piece of iron entering the crusher at one side, the anvil is deflected outwardly at the bottom as indicated on the left side of Figure 3. The d-eecting movement is initially heavily resisted 'by the spring 85, the resisting force progressively diminishing however with great the toggle progressively bends.

It will be understood that while the upper ends of the springs 85 should preferably engage flanges with the bolts 19, the springs may be supported for compression in any suitable way, as by engaging downwardly directed abutments of the stationary frame structure.v 'I'he latter method of support is less desirable, chiefly by rapidity as reason of less easy angular accommodation of' the bolts and spring members during bending of the toggle. 'v

The principal functions of the bolts 19 are to provide eiilcient mounts for the springs'85 and means for easily adjusting the extent to which the toggles are straightened out intheir normal undeected positions. The degree of straightening of the toggles is determined by the vertical position of the stop collars 86 beneath the head or key members 15 of the toggles. Obviously the downward straightening movement of the toggle may be adjustably limited in any suitable way otherjthan that shown.

In the event that one or more of the wear plates I3, I4, I5 and I6 need replacement, whether on the rocker or onone of the anvils, the hopper 58 v terial across the may be lifted awayand one or both of the nller members 49 and 59 at the ends of the rocker, which also overlap, the ends of the anvils, are then preferably removed. The nuts upon the bolts 52 are accessible from the outside andthe bolts are kept from turning by their square heads tting in square recesses on the interiors of the ller members.

When the filler members have been lifted out any one of the wear plates may be removed without need for removing either the anvil or the rocker, although both anvil and rocker are also readily removable.

I find resilient connection of the wear platesA to the crusher jaws to be very desirable, as it permits slight movement of the wear plates in case some uncrushable object is caught between the jaws. thus relieving excessive stresses and pre-.-4

venting breakage.

To remove the anvil, the nuts on the upper ends of the suspension bolts 19 are loosened and the pins 1I through the axes of the knees 66 are pulled out (being access'ble through suitable openings 95 in the end walls 41 and 48 of the frame and shell structure). The anvil may be then lifted away.`l

If desired, an anvil plate I5 for example, may be removed and replaced by a new plate without taking out the anvil.' This may be done by simply loosening the nuts that wedge this plate up resiliently to lock it at top and bottom.

As soon as the bolts 62 havey been moved somewhat diagonally downwardly; the wear plate is free to slide out at the top and then to be lifted away.

The resilient connection betwen the link 2| and the lower end of the main rocker is readily disconnected as by loosening the plate 4I from the top of the opening around the link, loosening the nuts 2 at the upper ends of the tiebolts 2 6 and 21, then removing the screw pins at 2lil that pivotally connect the tie bolts to the outer end "of the link.

When these pins have been removed the whole rocker may be lifted out after removal of the cap portions of the` horizontally divided pillow block bearings at Il.

In the same way the link and drive shaft may be moved out horizontally after taking off the cap portions of the vertically divided pillow block bearings 25 of the drive shaft.

The faces of the wear plates are vided with sloping serration in Figures 2, 5 and more suitably proilutings as best seen uniform distribution of the crushingmawidths of the cooperating jaws as the material delivers downward between the crushing members.

The flutings 96 on one side of a vertical center plane through the plate are preferably parallel to .one another and to that side of the plate and the utings 91 on the other side of the middle line'of the plate are in the same way parallel to one another and to the other side of the plate, the said ilutings 96 and 91 relatively diverging downwardly, as Iclearly shown in the figures. It will be evident that the principles of my invention may be applied in other settings, where for example both crusher jaws move, instead of one remaining normally stationary, and that the *snap release in case of overload of the jaws could we applied to either jaw or to both jaws. The use vof a head and socket connection between the rocker and the link greatly simplifies the construction and avoids expensive bearings.

e top and rear 6. These outings effect Fing POSitin thereon,

It will also be evident that the principles' of my invention may be appliedto other Crushers besides stone erushers, although stone Crushers are the preferable embodiment.

In/,view of my tion's and modifications to meet individual whim orf/particular need will doubtlessbecome evident to others skilled in the art, to obtain all or part of the benefits of my invention without copying the structure shown, such in so far as they fall within the reasonable spirit and scope of my invention.

Having thus described my invention, what I claim as new and desire to secure by Letters Patent is:

l. In a crusher having a rocker'and a jaw face thereon, an anvil and a support holding the anvil in cooperating relation with the jaw face, said support including Y stationary framework, a socket joint between top and rear of the anvil, preventing bodily upward and rearward yielding of the anvil at the said joint and permitting angular movement of the anvil aboutthe joint, means for holding the anvil in the socket, wardly spaced from the anvil at the lower end thereof, a toggle between the abutment and the anvil, the toggle anvil from moving toward the abutment and having a position but away from the dead center position of the toggle, means including springs for retainingthe toggle in its normal position adapted to release under abnormally against the toggle for preventing the-toggle'from moving into its dead center position. a

'2. In a crusher having a rocker' and a jaw face l thereon, an anvil vil in cooperating relation with the jaw face, saidl support including stationary framework, a diagonally downwardly .open knee and socket joint between the framework and anvil at the ward and rearward yielding of lthe anvil at the said jointo and permitting `angular movement of the anvil about the joint, means for holding the anvil in the socket, a stationary abutment rearwardly spaced thereof, a toggle between the abutment and the anvil, the toggle blocking the lower end of the anvil from moving toward the abutment and havduring normal crushing near to but away from toggle, means including springs for retaining the toggle in its normal positiony adapted to release* under abnormally high pressure upon the anvil, said means for retaining the toggle in its normal position including a stop engaging directly 60 against the toggle for preventing the toggle from moving into its dead center position, and means for adjusting the stationary abutment with respect to the-anvil in order to adjust the normal position of the anvil 3. In a crusher having a rocker and a jaw face an anvil and a support holding the anvil in cooperating relation with the jaw face, said support including stationary framework, a socket joint at the top vand rear of the anvil, preventing bodily upward and rearward yielding of the anvilat the said joint and permitting angular movement of the anvil about the joint, a stationary abutment rearwardly spaced vfrom the anvil at I5 invention and disclosure varia- 5 and I, therefore, claim all .10

the frame work and anvil at the 20 a stationary abutment-rear- 25 l blocking the lower end of the during normal crushing near t'o 30 high pressure upon the anvil,v

lmal position including a stop. engaging directly and a support holding the ane 40 of the anvil, preventingbodily up- 45 from the anvil at'the lower-,end 50 the dead center position of the 55 with respect to the rocker. c5

between the framework and anvil I head on the lower the lower end thereof, a toggle between the abutment and the anvil, the toggle including a toggle arm presenting one side against the anvil, a second toggle arm presenting one sideagainst the abutment, a vertically movable head or key receiving on its opposite sides the other of the toggle arms, a spring seat secured to the head or key, a spring pressing against the spring seat and urging the head or key ina direction to straighten the ,toggle and a stop operating against the head or key and limiting the normal position of the toggle to one near to but awayfrom that of straight alignment of the toggle arms.

.4. In a stone crusher having a rocker and a jaw face' thereon, an anvil-cooperating with said face, a pillow bearing supporting the upper end of the anvil from moving upwardly and rearwardly, an abutment rearwardly spaced from the anvil near the lower end thereof, a toggle connection between the abutment and the lower end of the anvil, the said togglel connection including a rocker shoe presenting one side against the anvil, a secondv rocker shoe presenting one side against the abutment, a vertically movable head or key receiving on its opposite sides the other sides of the rocker shoes, a bolt passing through the head or 'key in a direction generally transverse to the straightened toggle,l means for supporting the bolt against vertical movement, a collar 'on the bolt below the head or key limiting the straightening of the toggle, a carrying ange above the toggle and a spring around the bolt compressed between the ange and the head orkey.

5. The structure of claim 4 in which the means for supporting the bolt against vertical movement is longitudinally adjustably connected to the bolt.

6. The structure of claim 4 in which the means for supporting the bolt against vertical movementdncludes a horizontal rocker for angular accommodation of the bolt to the toggle.

7. In a crusher, an anvil, a rocker pivoted near its top, having a lateral jaw face lower than the pivot in cooperative relation with the anvil, the said rocker extending downwardly beyond the `law face for connection to a link, a link, a head and socket connection between the link and the rocker, spring means holding the bearing surfaces of the head and socket connection in close engagement and means for reciprocating the link.

8. In a crusher, an anvil, a rocker pivoted near its top, having a lateral jaw face lower than the pivot in cooperative relation with the anvil, the said rocker extending downward beyond the jaw face for connection to a link, a head on thellower end of the rocker, a link having a socket receiving the head on the bottom of the rocker, spring means holding the head in the socket and means for reciprocating the link.

9. In a crusher, an anvil, a rocker pivoted near its top, having a lateral jaw face lower than the pivot in cooperative relation with the anvil, the said rocker extending downwardly beyond the jaw face for connection to a link, a head on the lowerend of the rocker, a link havinga downwardly tapering socket, shoes fitting the tapered walls of the socket and presenting inner curved surfaces which engage the opposite sides of the end of the rocker, a spring wedging the shoes down about the head and means for moving the link. y

1G. In a crusher, an anvil, a rocker pivoted near its top, having a lateral jaw face lower than the pivot in cooperative relation with the anvil, and

11. In a stone crusher having a rocker and a jaw face thereon, a normally stationary anvil cooperating with the jaw face, a rearwardly and upwardly presented knee on-thewanvil, a stationary concave pillow bearing for the knee, spaced tie bolts pivotally connected to the knee and extending rearwardly and upwardly, a rearwardly and upwardly directed stationary abutment along an intermediate `portionof each tie bolt, a spring surrounding each tie bolt above the abutment, a nut on each tie bolt beyond the spring compressing the spring against the abutment thereby causing the tie bolts toresiliently hold the knee against its pillow bearing, venting rearward movement of the anvil at the lower end thereof during normal crushing between the jaw face and anvil and for permitting the said rearward movement responsive to pressures upon the crushing face of the anvil greater than those incident to normal crushing.

12. In a double acting crusher, a main rocker having horizontal pivot support and downwardly diverging sides below the pivot, wear plates removably mounted on the sides, engaging and being held to the rocker at the bottom by projections from the rocker sides under and angularly locking with the bottoms of the wear plates, spaced horizontal cross bars whose opposite ends are supported upon and angularly' lock withl the tops of the respective plates, a cap secured upon the top of the main rocker, vertical pressure bars pressing against the horizontal cross bars, and

spring means acting between the cap and Vertical pressure bars in recesses of the main rocker and urging the vertical pressure bars and through them the horizontal cross bars downwardly to- Ward their 4holding positions.v

13. In a crusher, a generally vertical rocker pivoted near the top and having a crusher jaw on one side, means for reciprocating the rocker, a generally vertical anvil cooperating with the crusher jaw on the rocker and having a knee near its upper end, a socket engaging the knee and pivoting the anvil, spring means urging the knee into the socket, a toggle holding the lower end ci the anvil and a spring urging the toggle against breaking.

14. In a crusher, cooperating crusher jaws, means for relatively reciprocating the jaws, a toggle supporting one end of one of the jaws, spring means urging the toggle against breaking and a support for the springv pivoted near one end, extending to the toggle and positioning the springbetween the pivot and the toggle, whereby,

with movement of the toggle, the lateral movement of the spring will be a maximum adjacent the toggle and will decrease toward the pivot.

l5. In a crusher, cooperating crusher jaws, means for relatively reciprocating the jaws. a pivotv for the upper end of one of the jaws, a toggle supporting the lower end of said jaw, a spring urging the toggle against breaking and-a support for the spring pivoted near one end, extending to the toggle and positioningthe spring between the toggle and thepivot of the-support for the spring. l

16. In a crusher, a gen rally, vertical rocker pivoted near its upper en forfreoiprocatlng the rocker, a generally v ical anvil cooperatand meanSfOl pre-k 'bolt between the pivot point'of the bolt and the head and an abutment engaging' one end of the spring, whereby `the spring will swing with ther ybolt about the pivot of the bolt when the toggle breaks.

17. In a'crusher, a rocker, an anvil pivoted at its upper end, a toggle supporting the lower end of the anvil and comprising toggle arms and a' toggle head between the toggle arms, a spring urging the toggle against breaking and a support for the spring pivoted beyond the end of the spring remote from the toggle.

18. In a crusher, a rocker hanging vertically, pivoted near the topand having a crusher jaw on one side, means for reciprocating the rocker,A

a generally vertical anvil cooperating with the crusher jaw on the rocker and having a knee near its upper end, a frame member having a socket engaging the knee and pivoting the anvil, spring means urging toggle supporting the lower end of the anvil, a,

continuously compressed spring urgng'the toggle against breaking and acting between said frame member and one side of the toggle and means acting between said frame member andthe other side of the toggle and positively holding the toggle e away from its dead center position.

EDWARD T. PETERSON.

the knee into the socket, a. 

